PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4391AWattmeter

Bird Electronic Corporation Div Bird Electronic Corp · NSN 6625-01-478-2653 · FSC 6625 · No Item Name Available
Verified by PartsTable
NSN 6625-01-478-2653 — this item is cataloged by the U.S. Government under National Stock Number 6625-01-478-2653. Primary manufacturer part number: 4391A.
Features
  • Wattmeter — FSC 6625
  • 6 verified cross-references
  • Primary manufacturer: Bird Electronic Corporation Div Bird Electronic Corp
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Wattmeter, cataloged under National Stock Number 6625-01-478-2653, is classified within Federal Supply Class 6625 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Bird Electronic Corporation Div Bird Electronic Corp. This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6625-01-478-2653
Primary Part Number4391A
Item NameWattmeter
FSC / FSG6625 / 66 — No Item Name Available
ManufacturerBird Electronic Corporation Div Bird Electronic Corp
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Shelf Life Code0
Unit of IssueEA
SMR CodeC
Weight14.8600 lbs
Cube3.0400 cu ft
Verified Substitutes 11
6625-01-227-43704391M SUCCESSOR
Wattmeter
Bird Electronic Corporation Div Bird Electronic Corp
Wattmeter
Meter,special Scale
4720-00-017-079728432 INTERCHANGEABLE
Hose,nonmetallic
Gates Corporation
5940-00-231-442314078057-6 INTERCHANGEABLE
Terminal,lug
Entron Industries Limited Partnership Dba Entron Industries Property Div
5905-00-274-128793J91R INTERCHANGEABLE
Resistor,fixed,wire Wound
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
6220-00-577-343412338610-1 INTERCHANGEABLE
Light,marker,clearance
U S Army Tank Automotive Command Amsta-Im-Mm
5360-00-663-11049039162 INTERCHANGEABLE
Spring,helical,compression
Allison Transmission Inc Dba Allison Transmission, Inc
5977-01-069-2693 INTERCHANGEABLE
Brush,electrical Contact
5305-01-601-74404391 INTERCHANGEABLE
Screw,machine
Harley Davidson Motor Co Inc
Cross-Reference Index
Part NumberManufacturer
4391 Bird Electronic Corporation Div Bird Electronic Corp (USA)
9039162 Thales Italia S. P. a. (ITA)
4391M Bird Electronic Corporation Div Bird Electronic Corp (USA)
4391A Leonardo Spa Helicopters Division - Production Site (ITA)
4391A Vicom Australia Pty Limited (AUS)
4391A PRIMARY Bird Electronic Corporation Div Bird Electronic Corp (USA)
Related Parts
6625-01-227-4370SUCCESSOR
WATTMETER
4391M
6625-01-518-5123SUCCESSOR
WATTMETER
6625-01-674-9849SUCCESSOR
METER,SPECIAL SCALE
4720-00-017-0797INTERCHANGEABLE
HOSE,NONMETALLIC
28432
5940-00-231-4423INTERCHANGEABLE
TERMINAL,LUG
14078057-6
5905-00-274-1287INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND
93J91R
6220-00-577-3434INTERCHANGEABLE
LIGHT,MARKER,CLEARANCE
12338610-1
5360-00-663-1104INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
9039162
5977-01-069-2693INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
5305-01-601-7440INTERCHANGEABLE
SCREW,MACHINE
4391
5331-01-680-8220INTERCHANGEABLE
O-RING
93270BN

Frequently Asked Questions

What is NSN 6625-01-478-2653?

NSN 6625-01-478-2653 is a Wattmeter, manufactured by Bird Electronic Corporation Div Bird Electronic Corp, classified under FSC 6625 (No Item Name Available). Status: active.

What are the part numbers for NSN 6625-01-478-2653?

NSN 6625-01-478-2653 has 6 cross-referenced part numbers: 4391 (Bird Electronic Corporation Div Bird Electronic Corp), 9039162 (Thales Italia S. P. a.), 4391M (Bird Electronic Corporation Div Bird Electronic Corp), 4391A (Leonardo Spa Helicopters Division - Production Site), 4391A (Vicom Australia Pty Limited) and 1 more.

What NSN replaces 6625-01-478-2653?

There are 11 known substitutes for 6625-01-478-2653: 6625-01-227-4370, 6625-01-518-5123, 6625-01-674-9849 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 4391A?

Key specifications for 4391A: End Item Identification: GENERAL APPLICATION - TEST EQUIPMENT (GEN-AP-T); Special Features: PEP RF PWR ANALYST; FREQUENCY 0.45-2700 MHZ, POWER RANGE; 100 MW TO 10KW; MEASURES FWD AND REFLECTED CW, FM OR PEP PWR, CALCULATES SWR MHz; End Item Identification: GENERAL APPLICATION - TEST EQUIPMENT (GEN-AP-T); Special Features: PEP RF PWR ANALYST; FREQUENCY 0.45-2700 MHZ, POWER RANGE; 100 MW TO 10KW; MEASURES FWD AND REFLECTED CW, FM OR PEP PWR, CALCULATES SWR MHz. 4 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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